Method and system for enhancing three dimensional face modeling using demographic classification
First Claim
Patent Images
1. A method for face modeling, comprising the steps of:
- (a) processing face detection and facial feature detection on a plurality of images for a person with a single or a plurality of image capturing systems,(b) locating four landmarks on the face of the person based on the facial feature detection,wherein the face is detected by the face detection, andwherein three point features from the four landmarks form a basis plane,(c) training support vector machine (SVM) based demographic classifiers with between one and two thousand images as an input at a learning phase,(d) processing said plurality of images to obtain demographic recognition of the person in the captured images using the support vector machine (SVM) based demographic classifiers,(e) choosing a face model specific to the demographic recognition of the person as an approximate face model,whereby calculation of affine coordinates using demographic dependent constant can be facilitated by the chosen approximate face model, and(f) combining said demographic recognition with affine coordinate based mesh adjustment technique for said face modeling,wherein said demographic recognition comprises gender and ethnicity recognition, andwhereby the face modeling is followed by a view generation of the face using rendering tools.
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Abstract
The present invention is a system and method for modeling faces from images captured from a single or a plurality of image capturing systems at different times. The method first determines the demographics of the person being imaged. This demographic classification is then used to select an approximate three dimensional face model from a set of models. Using this initial model and properties of camera projection, the model is adjusted leading to a more accurate face model.
25 Citations
28 Claims
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1. A method for face modeling, comprising the steps of:
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(a) processing face detection and facial feature detection on a plurality of images for a person with a single or a plurality of image capturing systems, (b) locating four landmarks on the face of the person based on the facial feature detection, wherein the face is detected by the face detection, and wherein three point features from the four landmarks form a basis plane, (c) training support vector machine (SVM) based demographic classifiers with between one and two thousand images as an input at a learning phase, (d) processing said plurality of images to obtain demographic recognition of the person in the captured images using the support vector machine (SVM) based demographic classifiers, (e) choosing a face model specific to the demographic recognition of the person as an approximate face model, whereby calculation of affine coordinates using demographic dependent constant can be facilitated by the chosen approximate face model, and (f) combining said demographic recognition with affine coordinate based mesh adjustment technique for said face modeling, wherein said demographic recognition comprises gender and ethnicity recognition, and whereby the face modeling is followed by a view generation of the face using rendering tools. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for face modeling, comprising:
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(a) a single or a plurality of image capturing means directed at a person, (a)(b) means for processing face detection and facial feature detection on a plurality of images for the person, (b)(c) means for locating four landmarks on the face of the person based on the facial feature detection, wherein the face is detected by the face detection, and wherein three point features from the four landmarks form a basis plane, (c)(d) means for training support vector machine (SVM) based demographic classifiers with between one and two thousand images as an input at a learning phase, (d)(e) a processing means for recognizing demographics from at least an image, (e)(f) a selection means that chooses a face model specific to the demographic recognition of the person as an approximate face model, whereby calculation of affine coordinates using demographic dependent constant can be facilitated by the chosen approximate face model, (f)(g) a processing means for combining the demographics recognition with affine coordinate based mesh adjustment technique for said face modeling, and (g)(h) at least a rendering tool for a view generation of the face, wherein the demographics recognition comprises gender and ethnicity recognition. - View Dependent Claims (7, 8, 9, 10)
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11. A method for face modeling, comprising:
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implementing facial feature detection using one or more images of a person, including locating at least four predetermined landmarks on an image of a face of the one or more images of the person; training support vector machine (SVM) based demographic classifiers using a plurality of sample images as an input at a learning phase; obtaining demographic recognition of the person using the one or more images based on the SVM based demographic classifiers, wherein the demographic recognition includes gender and ethnicity recognition; choosing a face model specific to the demographic recognition of the person to serve as an approximate face model; calculating an affine coordinate, facilitated by the approximate face model, using a demographic dependent constant; combining the demographic recognition of the person with an affine coordinate based mesh adjustment technique; and generating a 3D view of the face of the person using rendering tools. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for face modeling, comprising:
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a processor; and a storage unit configured to store executable instructions that, when executed, cause the processor to perform operations including; implementing facial feature detection on one or more images of a person; locating at least four designated landmarks on an image of a face of the one or more images based on the facial feature detection; training support vector machine (SVM) based demographic classifiers using plural sample training images as an input at a learning phase; recognizing demographics of the person using at least one of the one or more images; choosing a face model associated with the recognized demographics of the person as an approximate face model; calculating an affine coordinate, facilitated by the approximate face model, using a demographic dependent constant, changing means to a processor plus storage; combining the recognized demographics with an affine coordinate based mesh adjustment technique for said face modeling; and generating a 3D view of the face using rendering tools; wherein the demographics recognition comprises gender and ethnicity recognition. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification